Does this happen with the motherboard-clocks-cable soldered? When we developed it I remember soldering the ground wire for the vsync signal to what I thought was ground near the Videl connector. But the result was some kind of disturbance on the Videl output blue (not green IIRC). I removed the soldering of that ground wire eventually since the vsync signal is so low in frequency information anyway. So you should not solder the ground wire that belongs to the vsync signal. Just let it travel along the vsync signal.

OK. But you haven't soldered the ground wire that belongs to the vsync onto the motherboard , right? I think its presence induces interference into the analog Videl output, wether you have connected the other end to the SV or not.

Yes this has been about the Vsync signal at L29 the whole time. The clock signal is not the problem, and its ground is supposed to be soldered. But the Vsync ground wire must not be soldered, like the last picture in the manual says.

These speckles look static once they have appeared until they are overwritten, right? And full pixels. Then we can rule out interference in the analog Videl output.And they only happen in 060 mode?What is your CT60 clock freq?

I was using 1.04 CT60TOS and found that I'd left the switch to bus boost on as I have an original CT60 with the F030 boost. Then flicked it off and the machine wouldn't boot without it. Just kept resetting.

I read in the manual that 1.04 had some problems, so I tried 1.03c and hey presto. We're back in business

Unfortunately 1.03c disables my CTPCI

So tried 2.01, and it worked for the first two resets, and I'm back to a black screen at bootup. I don't think this is related to the SV though, I've always had this problem with the 2.0x series.

Good that you found the cause at least I used to run 2.01 until it killed itself. Then I also thought the hardware was at fault until I tried 1.03c which made the computer boot again.Therefore we recommend 1.03c over 2.01.1.04 has always had strange behavior so we recommend against it.